The tail gets its orders wirelessly from a brain wave-reading headset and clip-on heart monitor. If you're relaxed, it moves softly and slowly. If you're concentrating, its movements will quicken, according to its maker.

Shippo also lets you tag your wag location and share your mood with friends over social media.

Unveiled Saturday at the Tokyo Games Show, Shippo joins brain-activated cat ears on Neurowear's roster of trendy technology. The ears, called Nacomimi, sell for about $160. The price of Shippo, which is still a prototype, has not been released.